Abstract: A tandem photovoltaic device includes: a tunnel junction between an upper cell unit and a lower cell unit. The lower cell unit is a crystalline silicon cell. The tunnel junction includes: a carrier transport layer, a crystalline silicon layer, and an intermediate layer located between the carrier transport layer and the crystalline silicon layer. The carrier transport layer is a metal oxide layer. The intermediate layer includes a tunneling layer. The crystalline silicon layer has a doping concentration greater than or equal to 1017 cm?3. The carrier transport layer is in direct contact with a shadow surface of the upper cell unit. If the crystalline silicon layer is a p-type crystalline silicon layer, a first energy level is close to a second energy level. If the crystalline silicon layer is an n-type crystalline silicon layer, a third energy level is close to a fourth energy level.

Abstract: Methods, systems, and computer-readable storage media for providing a first instance of a database system within the cloud computing environment, determining that scale out of the database system is to be executed, and in response, providing a second instance of the database system within the cloud computing environment, the first instance and the second instance collectively defining a cluster, establish a remote direct memory access (RDMA) connection between the first instance and the second instance, copying data stored within the first instance to a data store of the second instance over the RDMA connection, and configuring the first instance to replicate a first transaction log to the second instance over the RDMA connection, and receiving, by each of the first instance and the second instance, requests from one or more client devices.

Abstract: The invention discloses a coordination type zirconium phosphotungstate catalyst and its application in catalytic hydrogenation of furfural, belonging to the field of heterogeneous catalysis. The zirconium phosphotungstate catalyst prepared by the invention not only has good catalytic effect on the conversion of furfural to furfuryl alcohol, but also has mild reaction conditions. The yield of solid line furfuryl alcohol can be 98% if it can be reacted for 1 h at 120 ° C., and the amount of catalyst is less, which greatly reduces the energy consumption in the prior art. In addition, the zirconium phosphotungstate prepared by the invention is easy to separate, has good stability for catalyzing the hydrogenation of furfural to furfuryl alcohol, and is a new, efficient and green catalyst.

Abstract: A follow-hold switch circuit comprising: a follower; a sampling sub-circuit for voltage sampling; a bootstrap-control sub-circuit, which provides a bootstrap voltage to the sampling sub-circuit when the circuit is in a following state; a sampling-switch-control sub-circuit, which provides a common-mode voltage to a bootstrap capacitor in the bootstrap-control sub-circuit when the circuit is in a holding state; the follower is connected to an output of the sampling sub-circuit; the sampling sub-circuit is connected to the bootstrap-control sub-circuit and the sampling-switch-control sub-circuit respectively through a sampling switch; the present disclosure can effectively improve the linearity of sampling switches.

Abstract: A high voltage battery cluster, and an overcurrent protection circuit and a switch box of the high voltage battery cluster are provided. The overcurrent protection circuit includes a first fusing module and a second fusing module. Since a withstand current-time curve of the first fusing module is different from a withstand current-time curve of the second fusing module, in a case that an overcurrent fault occurs in a high voltage battery cluster, one fusing module can cause an open circuit in the high voltage battery cluster prior to another fusing module, thereby preventing the high voltage battery cluster from being broken by a large current when an overcurrent fault occurs in the high voltage battery cluster, thus ensuring an electrical safety of the high voltage battery cluster.

Abstract: An X-ray system with a universal positioning system includes a multiple degree of freedom overhead support system mounted within a location for the X-ray system, a first imaging device on the overhead support system, a multiple degree of freedom wall stand disposed within the location for the X-ray system, the wall stand comprising a motive module and a number of moveable members operably connected to the motive module that can be operated by the motive module to move the wall stand over a floor of the location, a second imaging device mounted to the wall stand, a table disposed within the location for the X-ray system, including a base disposed on the floor of the location and a support surface secured at one end to the base, and a workstation including a processing unit configured to send control signals to and to receive data signals from the universal positioning system.

Abstract: A drawer assembly and a refrigerator, the drawer assembly comprising a drawer body, a slideway assembly for pushing and pulling the drawer body, and a damping reset unit matching the drawer body and being arranged on the sliding channel assembly, the damping reset unit comprising an elastic member for driving the drawer body to reset from an open state to a closed state and a damping member for reducing the reset speed of the elastic member. A refrigerator is provided with the drawer assembly. The arrangement of the damping reset unit enables the process of closing the drawer body to not require the application of external force during the entire process, and the arrangement of the damping member makes the rebound process of the drawer body much gentle, avoiding the vibration, noise, and damage that may be produced during rapid rebound.

Abstract: Embodiments of the present disclosure provide a dual-modality neuromorphic vision sensor. A first-type current-mode active pixel sensor (APS) circuit can mimic excitatory rod cells, to perceive light intensity gradient information in a target light signal, thereby improving a dynamic arrange of an image sensed by a neuromorphic, vision sensor and its shooting speed. In addition, a first-type control switch is introduced for each of non-target first-type photosensitive devices, to control the obtained light intensity gradient information, and adjust the dynamic arrange of the image sensed by the neuromorphic vision sensor, thereby adjusting the shooting speed, and realizing a reconfigurable effect A voltage-mode APS can mimic cone cells, to output a target voltage signal representing light intensity information in the target light signal, and perceive the light intensity information in the target light signal.

Abstract: Bandwidth part (BWP) configurations supporting various communication approaches (e.g., full duplex and/or half duplex operations) are described. Full duplex (FD) frequency-based BWP configurations may, for example, be configured as a subset of defined BWP resources for supporting full duplex operation by base stations and/or user equipments (UEs). Usable bandwidth of a FD frequency-based BWP configuration may be selected from half duplex frequency-based BWPs in legacy BWPs. Bandwidths of usable BWPs for a FD frequency-based BWP configuration may be selected so as to be non-overlapping in frequency. Transition between configurations and modes (e.g., between full duplex frequency-based BWP configurations, between half duplex and full duplex modes, etc.) may be managed to avoid periods in which a communication device cannot perform any uplink or downlink transmissions due to switching between defined BWP configurations, or otherwise reduces BWP switching time.

Abstract: In accordance with one or more embodiments herein, an integrated process for upgrading a hydrocarbon oil feed stream utilizing a delayed coker, steam enhanced catalytic cracker, and an aromatics complex includes solvent deasphalting the hydrocarbon oil stream; delayed coking the heavy residual hydrocarbons; hydrotreating the delayed coker product stream and the deasphalted oil stream to form a light C5+ hydrocarbon stream and a heavy C5+ hydrocarbon stream; steam enhanced catalytically cracking the light C5+ hydrocarbon stream; steam enhanced catalytically cracking the heavy C5+ hydrocarbon stream; passing at least a portion of the light steam enhanced catalytically cracked stream, the heavy steam enhanced catalytically cracked stream, or both to a product separator to produce a olefin product stream, a naphtha product stream, and a BTX product stream; and processing the naphtha product stream in the aromatics complex to produce benzene and xylenes.

Abstract: A display panel, a control method thereof, and a storage medium are provided. The method includes acquiring a first actual brightness parameter and a first reference brightness parameter at a first position; determining a first compensated brightness parameter at the first position according to the first reference brightness parameter and the first actual brightness parameter if the absolute value of the difference between the first reference brightness parameter and the first actual brightness parameter is not less than a first threshold; and determining a first target brightness parameter at the first position according to the first compensated brightness parameter and a first preset brightness parameter at the first position.

Abstract: A method for presenting EPG user interface, including: in response to a first input command, displaying an EPG user interface including a first presentation page; and in response to a second input command, switching the EPG user interface from the first presentation page to a second presentation page, where the first presentation page includes a first set of channels and programs in a first time period corresponding to the first set of channels; and the second presentation page includes the first set of channels and programs in a second time period corresponding to the first set of channels.

Abstract: The disclosure discloses a control device for a robot to tease a pet and a mobile robot. The primary sensor is configured to continuously collect a preset number of frames of pet motion images in each motion cycle. The state recognizer is configured to judge the matching between the pet motion images continuously collected by the primary sensor and a pre-stored digital image of pet behavior, and then parse a matching result into behavior state parameters of a pet. The behavior interferometer is configured to adjust and control a behavior state of the pet according to the behavior state parameters and an additional road sign image provided by the secondary sensor. The laser projector is configured to project a laser beam to form a structural light spot, so that the pet changes toward the behavior state adjusted by the behavior interferometer.

Abstract: An improved ultra-fast cooling system is disclosed for cryopreservation of biomaterials. The ultra-fast cooling system is designed to uniformly vitrify or partially vitrify biomaterials, including but not limited to, human biomaterials, proteins, peptides, cells, stem cells, antibodies, neurons, human tissue, organs, cornea, skin, retina, eggs, sperm, embryos, body fluids, blood, serum, lymph fluid, animal tissue, plant biomaterials, plant tissue, germ plasma, pollen, plant sap, and bioengineered tissue, without cryoprotectants or with a low concentration of cryoprotectants. Cooling rates are sufficient to uniformly cryopreserve biomaterials, and can be used in diagnostic cytology and biological cryofixation applications. Other materials also can be cooled uniformly, such as inorganic materials for processing.

Abstract: A laser glass doped with high concentration of mid-infrared fluoroindate and a preparation method thereof are provided in the present application, belonging to the technical field of luminescent glass. The laser glass doped with high concentration of mid-infrared fluoroindate includes the raw materials in parts by mole percentage: 27-38 parts of InF3, 13 parts of ZnF2, 10 parts of GdF3, 19 parts of BaF2, 5 parts of CaF2, 10 parts of SrF2, 5-15 parts of Al(PO3)3 and 1-11 parts of ErF3.

Abstract: Methods, systems, and devices for performing entropy coding for a palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video having one or more video regions including a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.

Abstract: A system for adjusting steering damping based on sound frequency analysis includes: an acoustic main body configured to play music and determine whether the music is being played; a sound collection device configured to collect a sound signal of the music being played; a sound frequency analysis device configured to receive the sound signal of the music collected by the sound collection device and determine whether the collected music has a strong beat; and a power steering electronic control unit electrically connected to the sound frequency analysis device and configured to receive a determination result of the sound frequency analysis device and adjust the steering damping according to the received determination result of the sound frequency analysis device.

Abstract: A communication method and apparatus, the method including sending, by a terminal device, a random access request to a network device, where the random access request includes a random access preamble, control information, and user data, the terminal device is in an inactive state, and the control information includes at least a connection identifier and an authentication identifier, receiving, by the terminal device, a random access response sent by the network device, and performing, by the terminal device, a state transition AND/OR operation corresponding to a message format of the random access response.

Abstract: The present disclosure relates to the technical field of air pumps on vacuum suction cups, and in particular, to an air pump with an automatic air pumping function. The air pump includes a shell and a sealing ring; an automatic air replenishing mechanism is arranged at one end of the shell, and the other end of the shell is sleeved with a mounting barrel; the automatic air replenishing mechanism includes a battery mounting box mounted on an inner wall of the shell; and a battery pack is arranged inside the battery mounting box.